Just installed Advanced iFrame Pro v2021.9

When I click on Advanced iFrame Pro on the left of the WordPress dashboard, I get the screen with all the settings that I can change including the product code field.

What I DON'T get is the update button that (I Believe) should show at the bottom of the screen.

As a result, I can't change any setting!

Just for full disclosure, earlier I had to deal with the following error:

• Warning: Declaration of TGM_Bulk_Installer_Skin::before() should be compatible with  Bulk_Upgrader_Skin::before($title = '') in
  removed link on line 1977 

and ...

• Warning: Declaration of TGM_Bulk_Installer_Skin::after() should be compatible with Bulk_Upgrader_Skin::after($title = '') in
  removed link on line 1999

I modified the class-tgm-plugin-activation.php file and changed "public function before() {" to "public function before( $title = '' ) {"

I also modified the class-tgm-plugin-activation.php file and changed "public function after() {" to "public function after( $title = '' ) {"

Anyway ...

I am running PHP 7.4.25

I am running WordPress 5.8

What am I doing wrong???

Dan Zumwalt